Hiking from a Cruise Ship?

Wife found an Iceland tour that has us stopping in Seydisfjordur, Akureyri, and Isafjordur.

We have: 1 day 8-5 at Seydis 2 days Akureyri 1 day 7-3 Isa

Wondering the best way to hike and what trails to take...when leaving port without a car. Is that even possible?

We're fairly experienced hikers do a lot in Utah, Washington, and the North East. Want to get out some trails just trying to figure out logistics.

Thanks